Magneti Marelli IAW 4AF keylock (immobilizer) remover

step-by-step method to remove keylock (immobilizer) for ECU Magneti Marelli IAW 4AF by reprogramming the EEPROM 95160 (2048 bytes size)

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• Required tools:

  • a Windows pc

  • Arduino uno r3, or its chinese clone

  
  • SOP8 clamp
  

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• Required software:

  • Arduino IDE

  • Pyton and Pyserial

  • PonyProgV117h

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• Step 1: install Arduino IDE

  https://www.arduino.cc/en/software

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• Step 2: install and configure Pyton and Pyserial

  • install pyton
    https://www.python.org/getit/

  • find the folder where the installed pyton.exe is located, it could be in one of the two following places
    C:\Python311
C:\Users\(your login user)\AppData\Local\Programs\Python\Python311

  • add pyton to the program runnable from command line:
    Control Panel -> System -> Edit system environment variables -> Press button "Environment variables"
Select "Path" entry and click button "Edit"
Click on "New" and paste the path of the folder where phyton.exe is located

  

  • install 7zip
    https://www.7-zip.org/download.html

  • download pyserial.tar.gz and uncompress it locally using 7zip
    https://pypi.org/project/pyserial/

  • install pyserial using windows terminal
    cd C:\Users\(your login user)\Downloads\pyserial-3.5.tar\dist\pyserial-3.5
python setup.py install

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• Step 3: prepare arduino for eeprom 95160 programming

  • download arduino sketch (EEPROG.ino) to dump/write/erase eeprom 95160
    https://github.com/cedricp/Arduino-95160

  • connect Arduino uno3 to the serial usb of the pc and use software Arduino IDE upload EEPROG.ino to an Arduino uno r3

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• Step 4: wire eeprom 95160 to Arduino

  • open ECU IAW 4AF, locate eeprom 95160 and hook it with the SOP8 clamp
    

  • wire eeprom 95160 to Arduino, accordingly with the following connections
    chip select (s) = 9
serial data input (d) = 10
serial data output (q) = 11
serial clock (c) = 12
write protect (w) = 13
hold (h) = 8
Vcc = 3.3v
Vss = GND
    

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• Step 5: download pyton scripts to manage eeprom 95160
  https://github.com/cedricp/Arduino-95160/tree/master/tools

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• Step 6: dump the eeprom 95160 content

  • open Windows terminal
  • locate to pyton scripts folder
    cd C:\Users\(your login user)\......\pyton scripts\
  • use pyton script dump_eeprom.py to dump the eeprom content in a local file
    dump_eeprom.py [comport] [filename]

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• Step 7: edit the local file to remove immobilizer

  • install PonyProgV117h
    http://www.lancos.com/ppwin95.html

  • open PonyProgV117h and set the following options
    chip 2402-16 (to threat the data in 2048 bytes format)
    Edit->Edit buffer enabled

  • open the file with the eeprom data dump and edit the following bytes
    

  • save the file

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• Step 8: write the 95160 eeprom

  • open Windows terminal
  • locate to pyton scripts folder
    cd C:\Users\(your login user)\......\pyton scripts\
  • use pyton script write_eeprom.py to write the eeprom with the content in the modified local file
    write_eeprom.py [comport] [filename]